Answer: 2.) Adverb Phrase
Step-by-step explanation:
The brick house on the hill is my favorite in the neighborhood.
The underlined word "on the hill" is an adverb phrase.
An adverb phrase is a phrase in a sentence that functions as an adverb. An adverb in a sentence modifies a verb or an adjective by adding more meaning and telling where, how or when an action is performed.
Just like an adverb has different types (adverb of manner, time, place, frequency and degree), so does an adverb phrase.
The adverb phrase "on the hill" is an adverb phrase of place because it describes the position of the brick house.